﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System.Windows.Input;

namespace Xceed.Silverlight.DataGrid
{
  internal abstract class EditKeyHandler : KeyHandler
  {
    #region Constructor

    protected EditKeyHandler( KeyHandler successor )
      : base( successor )
    {
    }

    #endregion

    protected abstract bool BeginEdit();
    protected abstract bool EndEdit();
    protected abstract bool CancelEdit();

    protected sealed override void Handle( KeyEventArgs e )
    {
      switch( e.Key )
      {
        case Key.F2:
          e.Handled = this.BeginEdit();
          break;

        case Key.Enter:
          e.Handled = this.EndEdit();
          break;

        case Key.Escape:
          e.Handled = this.CancelEdit();
          break;

        default:
          break;
      }
    }
  }
}
